Casting apparatus.



No. 759,569. PATENTED MAY l0, 1904. G. STROH.

CASTING APPARATUS.

APPLIOATION FILED AUG. 8, 1903.

No. 759,569. Y PATENTBD MAY 1o, 1904.

CASTING APPARATUS. APPLIUATION FILED AUG. 190s.

NO MODEL. 2 SHEETS-SHEBT 2.

me Nonms warms cov, pHoro-umu, vmsmucvou4 D. c.

UNITED STATES Patented May 10,` 1904.

PATENT OEEICE.

CASTING APPARATUS.

SPECIFICATION forming' part of Letters Patent No. 7 59,569, dated May 10, 1904,

Application filed August 8, 1903. Serial No. 168,749. (No model.)

To @ZZ whom it may concern.-

Be it known that I, GEORGE StrRoi-I, acitizen of the United States, and a resident of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Casting Apparatus, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

The object of this invention is to provide a simple, inexpensive, and eiiicient casting apparatus in which the molten metal shall be forced into the die or matrix by means of a pressure-chamber located within the meltingpot, and thus maintained at the same temperature therewith, and a cylinder communicating with said pressure-chamber and a plunger operating in said cylinder, both shielded from the intense heat of the combustion-chamber to guard against overheating said parts and to reduce the temperature thereof sufficiently to keep them in working condition; and to that end the invention consists in the improved construction of the casting apparatus hereinafter described, and set forth in the claim.

In the accompanying' drawings, Figure 1 is a vertical longitudinal section of a casting apparatus embodying my invention. Fig. 2 is a transverse section on line X X in Fig. l. Fig. 3 is a horizontal section on line Y Y in Fig. l, and Fig. 4 is a transverse section on line Z Z in Fig. 1.

Similar letters of reference indicate corresponding parts.

t represents the melting-pot, which is seated in a combustion-chamber Z), preferably formed of a surrounding lire-brick structure c, thro ugh which pass suitable burners Z CZ for supplying the requisite heat to the combustion-chamber.

e denotes the pressure-chamber, which is of cylindricalV shape and located within the melting-pot to partake heat therefrom with an equal degree of temperature. This pressurechamber is provided with a port f, through which it receives the molten metal from the melting-pot a. The top of the said pressurechamber is provided withasuitable dischargenozzle g, through which the molten metal is forced from the pressure-chamber into the die or matrix ZL, seated directly upon the said nozzle.

The melting-pot, with the inclosed pressurechamber, I form in one piece of cast metal and without any seam at the junction of said parts. rIhe said casting is suspended from the edges of an aperture in a plate A, mounted on a metal case C, embracing the {ire-brick work c, which forms thecombustion-chamber b.

From one end of the pressure-chamber e extends a cylinder e', in which operates a plunger j. To protect the said cylinder and plunger from the intense heat in the combustion-chamber b, I form around the said cylinder a cooling-compartment Z of the form of a shield a, extending from the end of the cylinder adjacent to the pressure-chamber to a suflicient distance beyond the opposite end thereof to inclose the plunger jwhere the shield is open to allow air to circulate around the cylinder and piston. The plunger is hollow or formed with a cavity 0, extending from the outer end of the plunger part Way the length thereof to allow the air tonirculate in the plunger and prevent its being excessively heated by contact with the molten metal in the pressure-chamber.

D represents a cylinder, which may be charged with either steam or gas or water under pressure. This cylinder is arranged axially in line with the cylinder e' and is firmly secured to a head on extensions e of the top plate A and base-plate B, as shown in Fig. 1 of the drawings.

p represents the piston; which works in the cylinder D and is connected to the plunger 7' by the rod t.

I preferably employ in addition to the cylinder D a trial-lever L, pivoted to a suitable bearing u on theextension e and connected at one end to the rod tand having its free end portion of sufficient length to alford the requisite purchase for moving the plunger. This trial-lever is desired to ascertain if the molten metal is in proper condition to be forced from the pressure-chamber before applying the pressure of the piston p.

What I claim as my invention isA A device of the type set forth comprising a the atmosphere, a plunger in said pressurechamber nolosed by said shield, and a. nozzle IO at the upper end of the pressure-chamber.

GEORGE STROH.

Witnesses:

J. J. LAASS, W. H. MEIER, Jr. 

